Stencil-printing apparatus.



No. 732,542. PATENTED JUNE so, 1903.

1). GBSTETNER.

STENCIL PRINTING APPARATUS.

APPLIOATION FILED 001214, 1902.- NO MODEL. 3 SHEETS-SHEET l.

onms PETERS co PHOTO LITHD., WASNINGTON, D4 0 I no noDnL.

A PATENTED D. GESTETNER.

JUNEYSO, 1903.

3 SHEETS-SHEET 2.

I j O c i O a 5' d z' a NORRIS PEYERS co. Pnmomma, WASHINGTON, D4 4:.

PATENTBD JUNE 30, .1903. I 1). GESTETNER. STENCIL PRINTING APPARATUS.

APPLIOATIOH FILED 001214, 1902.

no menu.

No. eeasae UNITE STATES Patented June so, 1903.

PATENT OFFICE.

' DAVID GESTETNER, OF LONDON, ENGLAND.

STENCIL-PRINTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 732,542, dated June 30, 1903. Application filed October 14, 1902. Serial No. 127,209. (No model.)

T0 on whom it'may concern.-

Be it known that I, DAVID GESTETNER, a subject of the King of Great Britain, residing at London, England, have invented certain new and useful Improvements in Stencil- Printing Apparatus, of which the following is a full, clear, and exact description.

The invention relates more particularly to that class of stencil-printing apparatus forming the subject of Letters Patent of the United States of America, granted to me, numbered 700,031 and 707,579 of theyear 1902; and it consists of means whereby the sheet of paper as it is fed to the machine is guarded from coming into contact with the surface of the lower inking-roller and of meansfor facilitating the attachment of the stencil to the machine and of securing its correct relation thereto.

I will describe my invention by the aid of the accompanying drawings, in which Figure 1 is an end elevation of parts of the machine, showing the inking-rollers, waverrollers, endless band around the inking-rollers and porous sheet, paper-guard, and stencil carried by the endless bands. Fig. 2 is a view of the pair of endless bands developed in a plane with the porous sheet, paper-guard, and stencil thereon, parts being shown broken away to reduce the size of the drawings and to facilitate comprehension of the invention. Fig. 3 is aface view of aportion of the stencil-sheet, showing the improvement therein.

' Fig. 4 is an edge view, to an enlarged scale,

of part of an endless band, part of the paperguard, and part of the stencil-sheet in position on the endless bands; and Fig. 5 is a similiar section drawn 011 the line 5 5 of 2.

In some of the views the dimensions of some parts are exaggerated. for the sake of clearn'es's.

a a* are the inking-rollers b is part of an end frame.

0 c are endless bands, one of which is placed around each end of the inking-rollers a (0*.

g g are waver-rollers for distributing the ink.

The above parts are constructed and operated preferably'in the manner shown and described in the specifications of my aforesaid patents.

For this purpose the paper-guard d, which.

may be of leather, cloth, or other suitable material, has fixed thereto on its longer edges two bars d d by which it is fixed to the endless bands 0 c. For this purpose the bar d has formed therein near each end akeyholeslot (1 and the bar d has formed therein near each end similar keyhole-slots d. The endless bands 0 c are provided with studs or but tons c 0 The studs 0 are near the outer edges of the endless bands 0 c and the studs 0 are near the inner edges thereof. The keyhole-slots d and d are respectively at the same horizontal distances apart as the studs 0 c and the larger circular portions of said slots are at the same vertical distance apart as that of the studs 0 0 By this means the paperguard d can only be placed in the proper position on the endless bands 0 o.

The bars (6 d are preferably made of sheetmetal, and to stiffen the same they are folded over along their long edges. The paper-guard d is conveniently connected to said bars 0? d by being inserted within the folds (l (1 thereof and by rivets d in the bar (1.

e is the porous sheet. Its ends are connected to bars 6 19, which are preferably of sheet metal with folded edges similar to the bars (Z (1 the endedges of the porous" sheet 6 being conveniently fixed thereto by being gripped within the folded edges 6 of such bars. The bar e has keyhole-slots 6 formed therein to enable it to be removablyfixed to the bar 01 by passing said slots over studs or buttons d fixed in said bar. The bar 6 is -removably connected to the endless bands 0 c by means of springs 6 connected at one end to said bar and having rings 6 at their free ends, which are passed over hooks c fixed to said endless bands. By these means the porous sheet 6 is readily fixed in position for use and it is kept in proper tension by the, springs 6 f is the stencil-sheet. This sheet, when it is to be used in a type-writer, is usually made up with a sheet of tissue paper in front of the stencil-paper and a sheet of more solid paper at the back having numbers along each veroil is made these sheets of tissue and stronger paper are torn off, leaving short pieces thereof, which in the drawings are markedff If, however, the stencil is made by a cyclostylepen, or stylus, these sheets of paper in front and back of the stencil are not used. They therefore, although shown in the drawings, do not form any part of my invention and are not necessary to the carrying into effect of the same, except so far as they serve to strengthen the edge of the stencil.

One edge f of the stencil-sheet is thickened or strengthened in any suitable manner. That shown in the drawings is by means of the papers f f combined with the stencil-sheet, the paper f being folded over a short distance, so as to inclose the stencil-sheet and paper f within the fold, the parts being caused to adhere together by means of wax, cement, varnish, or other suitable vehicle. This strengthened edge has keyhole-slots f formed therein to fit overthe studs (1 thus enabling the stencil to be secured in proper position on the machine, the body of the stencil, as in my said former patents, adhering firmly to the inked porous sheet.

It will be evident that stencil-sheets of the character above described may be used with other classes of stencil-printing apparatus.

I attach importance to the use of openings in the edge of the stencil and projections coacting therewith in the respect that the unskilled operator is enabled to quickly and accurately adjust the stencil in position. Obviously this is desirable under any conditions. It is peculiarly desirable, however, in that the operator when cutting the stencil may determine with absolute precision just where and how every part thereof should be arranged, having in view the ultimate result upon the impression paper. Thus where a spaceas, for instance, a date -line-in a printed form or letterhead is to be filled in its position on such form or head may be determined and accurately located on the stencilsheet by means of the marginal numbers on such sheet or the backing to which it is secured. After the insert is cut in the stencil it is obvious that the latter must be secured in a definite and fixed position upon the machine; otherwise such insert may be displaced relatively to the blank which it is to fill. This end is accomplished (and in a manner requiring no skill on the part of the operator) by the stencil securing means herein described, in the use of which there is but one correct position for the sheet, readily ascertained and carried into effect by the coaction of the edge openings of the stencil and the studs on the mechanism. The position of the stencil is unchanging, and the printing point or points thereon, predetermined with reference to the requirements of the impression-paper, may therefore be nicely and accurately located.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In stencil-printing apparatus of the character herein referred to, the combination with inking -rollers and endless bands passing around said rollers, of a paper-guard removably attached to the endless bands, substantially as herein set forth.

2. In stencil-printin g apparatus of the character herein referred to, the combination with inking rollers and endless bands passing around said rollers, of a removable paperguard having bars fixed to its horizontal edges, keyhole -slots near the ends of said bars and studs in the said endless bands, to pass through such keyhole-slots to retain the paper-guard in correct position, substantially as herein set forth.

In stencil-printing apparatus of the character herein referred to, the combination with inking-rollers and endless bands passing around said rollers, of a removable paperguard having bars along its horizontal edges adapted to be secured to the said endless bands, studs along one of said bars, a porous sheet having a bar fixed to each horizontal edge, keyhole-slots in one of said bars adapted to pass over the studs in the aforesaid paperguard bar, springs attached to the other bar, and hooks fixed to the endless bands to which the outerends of the springs can be attached, substantially as herein set forth.

at. In stencil-printing apparatus of the character herein referred to, the combination with inking rollers and endless bands passing around said rollers, of a bar removably attached to the endless bands, studs in said bar, a porous sheet with keyhole'slots along one edge adapted to pass over said studs, springs removably connecting the opposite edge of said porous sheet to the endless bands, and a stencil-sheet having a thickened edge and keyhole-slots in said thickened edge adapted to pass over said studs, substantially as herein set forth.

5. In stencil-printin g apparatus of the cl1aracter herein referred to, the combination with inking rollers and endless bands passing around said rollers, of a bar attached to the endless bandsand having studs, and a stencilsheet having a strengthened edge and provided with keyhole-slots adapted to coact with said studs, substantially as set forth.

6. In a stencil-printing apparatus having a bar moving with the printing mechanism, the combination therewith of studs on said bar, a stencil-sheet having a strengthened edge and keyhole-slots in said edge adapted to pass over said studs to secure the stencil in correct position, substantially as herein set forth.

7. I11 stencil-printing apparatus, the combination with a lnovin g part of the mechanism, of studs thereon and a stencil-sheet provided with keyhole slots adapted to coact with said studs, substantially as set forth.

ICC

8. In stencil-printing apparatus, a stencilsheet having a strengthened edge and keyholeslots formed therein, substantially as set forth.

9. In stencil-printing apparatus, a stencilsheet having keyhole-slots and another sheet secured on one side of said stencil-sheet, substantially as set forth.

10. In stencil-printing apparatus, a stencilsheet having keyhole-slots and a tissue sheet secured on one side of said stencil-sheet, substantially as set forth.

11. In sten oil-printing apparatus, a stencilsheet, another sheet secured on one side thereof, and keyhole-slots formed in one edge of said sheets, substantially as set forth.

12. In stencil-printing apparatus, a stencilsheet having keyhole-slots, and a sheet secured to each side of said stencil-sheet, substantially as set forth.

13. In stencil-printing apparatus, astencilnature in presence of two Witnesses.

sheet, a sheet secured to each side thereof, and keyhole-slots formed in one edge of said sheets, substantially as set forth.

14. In stencil-printing apparatus, a stencilsheet, another sheet secured thereto at one edge, and keyhole-slots formed in said sheets at their point of attachment, substantially as set forth. 1

15. In stencil-printing apparatus, a stencilsheet and a sheet upon each side thereof, said sheets being attached at one edge and there provided with keyhole-slots, substantially as set forth.

' In testimony whereof I have affiXed my sig- D. GESTETNER.

Witnesses:

B. J. B. MILLs, CLAUDE K. MlLLs. 

